apollo.io
Apollo.io is a sales intelligence and engagement platform for searching and enriching people and company data and managing go-to-market workflows. It also provides CRM, sequencing, analytics, and related sales operations features.
Apollo.io exposes a REST API at `https://api.apollo.io/api/v1`, a remote OAuth-protected MCP server at `https://mcp.apollo.io/mcp`, and a first-party `apollo` CLI.
- Apollo MCP serverdetected
- Apollo REST APIdiscovered
- Apollo CLIdiscovered
In Apollo, go to Settings > [Integrations](https://app.apollo.io/#/settings/integrations) > [API Keys](https://developer.apollo.io/keys#/), click Create new key, choose the endpoint access (or Set as master key), then click Create API key and copy the displayed key to a secure location. The walkthrough is in Create an API Key.
Point your MCP client at the server URL and approve access in the browser. The server supports OAuth Dynamic Client Registration (RFC 7591), so the client registers itself automatically — no developer-portal app, client_id, or client_secret to create.
$ apollo auth loginAcquired by the CLI — running apollo auth login opens the auth flow and stores the credential.
conventions · 1/8 published
- integrations.json✗
/.well-known/integrations.json - llms.txt✓https://apollo.io/llms.txt
- API catalog✗
/.well-known/api-catalog - OpenAPI document✗
/api/schema/, /openapi.json, /swagger.json, /api/openapi.json, or /v1/openapi.json - MCP server card✗
/.well-known/mcp/server-card.json - OAuth protected resource✗
/.well-known/oauth-protected-resource - Agent card✗
/.well-known/agent-card.json - Agent skills✗
/.well-known/agent-skills/index.json
Publish these signals → /publishing